/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors 
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.deletedobject.hibernate;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.List;
import lombok.extern.slf4j.Slf4j;
import org.hibernate.StatelessSession;
import org.hibernate.event.spi.PostCommitInsertEventListener;
import org.hibernate.event.spi.PostInsertEvent;
import org.hibernate.persister.entity.EntityPersister;
import org.hisp.dhis.common.EmbeddedObject;
import org.hisp.dhis.common.IdentifiableObject;
import org.hisp.dhis.common.MetadataObject;
import org.hisp.dhis.deletedobject.DeletedObject;
import org.hisp.dhis.deletedobject.DeletedObjectQuery;
import org.hisp.dhis.deletedobject.DeletedObjectService;
import org.springframework.stereotype.Component;

@Component
@Slf4j
public class DeletedObjectPostInsertEventListener implements PostCommitInsertEventListener {
  private final DeletedObjectService deletedObjectService;

  public DeletedObjectPostInsertEventListener(DeletedObjectService deletedObjectService) {
    checkNotNull(deletedObjectService);
    this.deletedObjectService = deletedObjectService;
  }

  @Override
  public boolean requiresPostCommitHanding(EntityPersister persister) {
    return true;
  }

  @Override
  public void onPostInsert(PostInsertEvent event) {
    if (IdentifiableObject.class.isInstance(event.getEntity())
        && MetadataObject.class.isInstance(event.getEntity())
        && !EmbeddedObject.class.isInstance(event.getEntity())) {
      StatelessSession session = event.getPersister().getFactory().openStatelessSession();
      session.beginTransaction();

      try {
        List<DeletedObject> deletedObjects =
            deletedObjectService.getDeletedObjects(
                new DeletedObjectQuery((IdentifiableObject) event.getEntity()));

        deletedObjects.forEach(session::delete);

        session.getTransaction().commit();
      } catch (Exception ex) {
        log.error("Failed to delete DeletedObject for:" + event.getEntity());
        session.getTransaction().rollback();
      } finally {
        session.close();
      }
    }
  }

  @Override
  public void onPostInsertCommitFailed(PostInsertEvent event) {
    log.debug("onPostInsertCommitFailed: " + event);
  }
}
